“他到底来不来？”这句话的语气是？
“他到底来不来?” What's the tone?
全球翻车率（内测预估）
✓催促、有点不耐烦
cuī cù、yǒu diǎn bú nài fán · chivvying you along, slightly impatient
B邀请
yāo qǐng · an invitation
C无所谓
wú suǒ wèi · doesn't matter
D礼貌询问
lǐ mào xún wèn · a polite enquiry
“到底”一出，耐心已经见底。
到底 (“after all / in the end”) signals impatience — the speaker's patience has bottomed out.